The kids (and grown-ups) at Waterloo Labs in Austin, Texas have come up with a way for us to play…
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Transforming four regular karts, they feature weapon launchers. But that's just the start of the "realness". Strung up over the course were item boxes which would be scanned, after which the driver would be randomly assigned a power-up. If a weapon was hit, then the karts were able to simulate some of the effects, locking up the wheel or hitting the brakes (or even speeding up if you hit a star).